Toshiba 65H83 is flickering after maybe an hour on. Is this a convergence chip issue?
I dont know what happened to my last post. None the less. After about an hour on my TV will start to flash or flicker while I am on any input. I dont know if its a convergence chip issue or an over heating issue or both. If I unplug the tv for a 10 min everything seems to be okay for about an hour and it starts happening again. I have tried resetting the tv by keeping it unplugged for a few days but still the same issue happens. What should I do to fix this issue?
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Re: Toshiba 65H83 is flickering after maybe an hour on....
Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
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More likely is the set is in shutdown---most common issue on this type of set is the convergence---to know you would have to locate and unsolder both 18 pin convergence chips---with them out of the circuit if the set comes on (will not look good) one of the two chips is shorted--these sets have very good protection circuits to prevent many parts from being destroyed at one time..
These are the chips--STK number is right on the front.
Ur tv have convergence problems,it dead.U must have soldering tools,solders and know how to solders to fix convergence problems.U must replaced 2 STk convergence ICS,and some or all it resistors.Tries websites Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost U $300-$350 for parts and labors.
I would chack the solder connections at the convergence ICs first. Since the set "recovers" on its own, it suggests a connection issue rather than a defective component. Also, if the ICs were installed without sufficient heat sink compound, this could happen as well. Look at low valued resistors in the area of the ICs for signs of overheating as well.
this is a rear projection tv not lcd the color is off because the convergance chips are bad take the board out that has the tow stand up chips attached to heatsinks out order the stk number search for on google then take a om meter check all the resistors aroung the chips replace them also you must be a excellent soilder person or a tech to install and remove these chips
I made the same repair in a Toshiba 42h81 I replaced the STK 392-110 and after a lot of searching found the cheaper ones last 6 month or so be sure to use Sanyo IC's and replace the resistors with them when the IC's let go they take the resistors out I posted my repair On my page if it will help you dennisgm052.weebly.com
Did you check to be certain none of the resistors were burned or open that power the ICs ? This is fairly common for one or two of the convergenvce resistors to be open when the ICs go out. Also double check the iC pins to insure that none of the pins are bridged with solder. If you need more assistance please let me know.
You may have bad convergence chips in the set. I have worked on some with similar problems and replacing the convergence chips was the solution. Good luck and I hope this has helped.
Does the blue and red crosses move at all ... eather vertically or horizontally. if they move at all then it may not be the chips.. could be a resistor. if the crosses dont move then it probally the ic. these chips run about 7 to 45 dollars apeace depending on type. at our shop we charge around 125 to put in.